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ad-work [718]
3 years ago
12

7x + 5=-2 find the value of 8x

Mathematics
1 answer:
Ymorist [56]3 years ago
5 0
7x+5=-2\\7x=-2-5\\7x=-7\\x=-1\\\\8x=8*(-1)=-8

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Two cars traveled equal distances in different amounts of time. Car A traveled the distance in 4 h, and Car B traveled the dista
poizon [28]
The rate of Car A is x
The rate of Car B is x - 5

They travel the same distance. So we can make an equation:

4(x) = 4.5(x-5)

Solve for x.

4(x) = 4.5(x-5)
4x = 4.5x - 22.5

Subtract 4.5x on both sides

-0.5x = -22.5

Divide by -0.5 on both sides
x = 45

But we want the speed of Car B which is x - 5

So Car B's speed is 45 - 5 = 40

Your answer is 40
8 0
3 years ago
1. If B is between A and C, AB = 12 in., and AC = 19 in., then what is BC?
Oksanka [162]

Answer:

BC = 7.

Step-by-step explanation:

subtract 12 inches from 19 and then you get the result for BC.

8 0
3 years ago
Darla has four buckets shaped like cylinders she is filling the buckets with water by using a scoop shaped like a cone if the co
padilas [110]

Answer:

12 Scoops

Step-by-step explanation:

Darla has 4 Cylinder Shaped Buckets

Volume of the Cylinders =4*\pi r^2h

The scoop is cone shaped and:

Volume of the Cone Scoop =\frac{1}{3} \pi r^2h

Since the radius and height of the cone scoop and cylindrical buckets are the same,

The number of Cone Scoops it will take to fill the buckets is:

Total Volume of Buckets/Volume of Cone Scoops

=\dfrac{4*\pi r^2h}{\frac{1}{3} \pi r^2h} \\=4 \div \frac{1}{3}\\=12

It will take 12 Scoops to fill the 4 buckets.

5 0
3 years ago
Please help solve
Veronika [31]
The answers to the first two systems of equations

3 0
2 years ago
Snack in our class occurs at 9:50 am. We eat lunch at 12:05 pm. How long to students need to wait
Novay_Z [31]

Answer:

2 hours and 15 minutes

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
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